usb: xhci: Fix sleep in atomic context in xhci_free_streams()

{
  "id": "4fa230c822c8b8eae93d31566a9c3eff564017950756c6cf9cb6831f500e8808",
  "url": "https://osv.dev/vulnerability/CVE-2026-64465",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usb: xhci: Fix sleep in atomic context in xhci_free_streams()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix sleep in atomic context in xhci_free_streams() When a USB device with active stream endpoints is disconnected, xhci_free_streams() is called from the hub_event workqueue to free the stream resources. It calls xhci_free_stream_info() while holding xhci->lock with irqs disabled. xhci_free_stream_info() invokes xhci_free_stream_ctx(), which calls dma_free_coherent() for large stream context arrays. dma_free_coherent() can sleep (e.g. via vunmap), triggering a BUG when called from atomic context. Call trace: dma_free_attrs+0x174/0x220 xhci_free_stream_info+0xd0/0x11c xhci_free_streams+0x278/0x37c usb_free_streams+0x98/0xc0 usb_unbind_interface+0x1b8/0x2f8 device_release_driver_internal+0x1d4/0x2cc device_release_driver+0x18/0x28 bus_remove_device+0x160/0x1a4 device_del+0x1ec/0x350 usb_disable_device+0x98/0x214 usb_disconnect+0xf0/0x35c hub_event+0xab4/0x19ec process_one_work+0x278/0x63c Fix this by saving the stream_info pointers and clearing the ep references under the lock, then calling xhci_free_stream_info() outside the lock where sleeping is allowed.",
    "evidence": "osv:CVE-2026-64465",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.261",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.212",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.178",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.145",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.96",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.39",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-64465",
      "aliases": [
        "CVE-2026-64465"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8df75f42f8e67e2851cdcf6da91640fb881defd1"
                },
                {
                  "fixed": "e623e4a203f56d5c57519a9a3cb29600551534ad"
                },
                {
                  "fixed": "d107eb316144c5fb958486e7fe604cd7f1b35cda"
                },
                {
                  "fixed": "1e45aa722c4ce5663e987102aac18c8ad6a83fdd"
                },
                {
                  "fixed": "10666ac9c552990204e791af653abf8e9d9ff619"
                },
                {
                  "fixed": "f7b022ae07685e7526fc39f387ce65b5d309dd3b"
                },
                {
                  "fixed": "f90586129cf9e1fbdb718ef602eea3f15dc1c31c"
                },
                {
                  "fixed": "93cd037da94fcb93183bfb2457e3a56d3eb4c8f4"
                },
                {
                  "fixed": "42c37c4b75d38b51d84f31a8e29427f5e06a7c2a"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64465.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.35"
                },
                {
                  "fixed": "5.10.261"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.212"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.178"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.145"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.96"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.39"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64465.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.443064872Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/10666ac9c552990204e791af653abf8e9d9ff619",
        "https://git.kernel.org/stable/c/1e45aa722c4ce5663e987102aac18c8ad6a83fdd",
        "https://git.kernel.org/stable/c/42c37c4b75d38b51d84f31a8e29427f5e06a7c2a",
        "https://git.kernel.org/stable/c/93cd037da94fcb93183bfb2457e3a56d3eb4c8f4",
        "https://git.kernel.org/stable/c/d107eb316144c5fb958486e7fe604cd7f1b35cda",
        "https://git.kernel.org/stable/c/e623e4a203f56d5c57519a9a3cb29600551534ad",
        "https://git.kernel.org/stable/c/f7b022ae07685e7526fc39f387ce65b5d309dd3b",
        "https://git.kernel.org/stable/c/f90586129cf9e1fbdb718ef602eea3f15dc1c31c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64465.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64465",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64465.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64465",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 507194,
  "published_at": "2026-07-25T08:51:31.16+00:00"
}